Superheater-boiler.



J. E. BELL.

SUPERHEATER BOILER.

APPLICATION FILED JUNE 6, 1906. RENEWED APR. 4, 1907.

Patented Jan. 5, 1909.

2 SHEETS-SHEET 1.

WITNESSES J. E. BELL.

SUPERHEATER BOILER.

APPLICATION FILED JUNE s, 1906. RENEWED APR. 4, 1907.

908,939. Patented Jan.5,1909.

'2 SHBETSSHEET 2.

WITNESSES I I INVENTQR UNITED STATES PATENT OFFICE,

JOHN E. BELL, on NEW YORK, N. Y., ASSIGNOR TO THE BABcoc awiLeox COMPANY, or

NEW YORK, N. Y., A CORPORATION or NEW JERSEY.

SUPEREEATER-IBOILER.

Specification of Letters Patent.

Patented Ian. 5, 1909.

Application filed June 6, 1906, Serial No. 320,868. Renewed April 4, 1907. Serial No. 366,411.

To all whom it may concern:

Be itknown that I, J OHN E BELL, of New York, in' the county and State of New York, have invented a new and useful Superheater- Boiler, of which the following 1s a full, clear, andex'act description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a sectional side elevation, showing one form of my improved superheater boilers; and Figs. 2 and 3 are similar views, partly broken away, showing modified forms.

and 7 with a mud drum 8. This mud drum may be either a single or double compartment drum, or maybe in the form of two or more connected mud drums. The superheater, which I have shown as consisting of T ,u shaped tubes 8 and connecting end boxes 9 and 10, is placedab'ove the steam and water drums.

In order to direct the hot ases over thesuperheater tubes, I provide .t e front bafile 11 with an extension 12, which prevents the gases passing rearwardly under the drum 3.

g The space between the drums 3 and 4 is left open, so that the gases flow up between the water circulatingtubes 13 and the steam connecting tubes I l-and into the box-like top extension 15 of the casing, which incloses the su erheater and is preferably of the same wi th as the boiler second bafiie 16 is also provide tension 17 leading, to the drum 2, which Setting. The

compels the gases flowing 'over the'super-- heater tubes toxdescend among the second of tubes to the bottom of the.baflle before they rise through, the third bank of,

tubes and pass to the outlet-flue 18. The

drums 2 and ,3 are preferably connected by steam tubes 19, the sttlam being taken to the superheat'er from the middle upper drum 3 with an ex-' water drums.

through the supply-tube 20. This tube leads to one of the superheater boxes shown at 9, while the outlet-pipe '21 for superheated steam leads from the other box. Those portions of the three drums which are above the normal water level and in contact with the hot gases, are preferably protected by la ing or refractory covering shown at 22,

23 and 24. This is to prevent the burning of the drums in which the steam circulation is g: course less rapid than in the superheater tu s.

In the use of the apparatus, the flame and ,gases rise from the combustion chamber 25 andpass up among the from bank of tubes, and thence upwardly between the drums 3 and 4- and among tubes 13 and 14 into superheater chamber. They thence flow back over the superheating' tubes and descend among'the tubes- 19 and between the drums- 2 and 3 whence they pass down through the second bank of tlibes. They then reach the lower end of the hams 1-6, and rise among the third bank of tubes to the outlet flue.-

In Fig. 2 I show a form similar to; Fig.1, except that the position of tlie superheatet' boxes is reversed,- the boxes 9 and 10* being at the, rear. In this figure parts similar to those in Fi 1 are marked with similar numorals 'W'it the letter it applied;

In Fi 3-1, show a form similar to Fig. 1 except t at the boxes 9" and 10 are located in the side-wall of the s'uperheater chamber or box, the U-shaped su erheatr tubes extending transversely othe setting and parallel with the axes of the drums. In this case the superheater tubes may extend substantially the width of the boiler, or the boxes may be applied to both side walls, the u-shaped tube extending to near the center of the boiler. i

The advantagesof my invention result from the peculiar location of the superheater, which is easily accessible for cleaning, repairs, etc. The sup'erheater may be easily applied to existiii boilers where the head room is present, wlth few changes in the setting. The boiler can also be easily converted into a saturated steam boiler by removing the bafile extensions 1'2 and 17, and if desired, closin the spaces between the V v T e flame and gases pass over water-tubes before reaching the super-' heater, thus preventing burning of the superhe'ater.

tially as described.

The number of steam and water drums may be varied. Two or more mud drums may be used; the drums may be longitudinal instead of transverse as shown; if transverse drums are used the number of banks of tubes may be varied, and many other variations may be made without departing from my invention I claim 1. A water tube boiler having transverse steam and water drums connected by banks of tubes to a lower mud drum or drums, a superheater located in the boiler setting over the steam and water drums, and batlling arranged to direct the gases successively over water tubes thence up over the superheater and thence down and over other water tubes of the boiler, substantially as described.

2. A water tube boiler having transverse steam and water drums connected by banks of tubes to a lower mud drum or drums, a superheater located within the boiler setting above the steam and water drums, and baflling arranged to direct the gases successively over the front water tubes, thence over the superheater and thence over successive water tubes of the boiler; substantially as described.

3. A water tube boiler having transverse steam and Water drums connected by sets of tubes to a transverse mud drum or drums, a

source 'of. heat in front of the front bank of tubes, bafiling arranged to direct the gases among the front tubes, thence over one of the steam and Water drums and thence down among further water-tubes, and a superheater in the path of the gases; substan- 4. A Water tube boiler having transverse steam and Water drums connected by set-s of tubes to a transverse mud drum or drums, a source of heat in front of the front bank of tubes, baffling arranged to direct the gases among the front tubes, thence over one of the steam and Water drums and thence down among further Water tubes, a superheater in the path of the gases, and protective covering for the steam space of the steam and Water drum; substantially as de-. scribed.

5. In a Water tube boiler, a steam and water drum having tubes connecting it with a mud drum, and bathing arranged to force the gases upwardly among the tubes and over the top of the steam and water drum and thence down among other water tubes below said steam and water drum; substantially as described.

6. In a water tube boiler, a steam and Water drum having tubes connecting it with a mud drum, bafliing arranged to force thegases upwardly among the tubes and over the top of the steam andwater drum and thence down among other water tubes below said steam and water drum, and a superheater in the path of the gases and above said steam and water drum; substantially as described.

7. A water tube boiler having at least two transverse steam and water drums connected by banks of tubes to one or more transverse mud drums, source of heat in front of the front bank, battling in the rear part of the front bank arranged to force the gases upwardly among the tubes and through the space between the firstand second steam and water drums into a chamber extending over the drums, and rear battling arranged to cause the gases to thence pass downwardly among the second bank of tubes; substantially as described.

8. A water tube boiler having at least two transverse steam and water drums connected by banks of tubes to one or more transverse mud drums, a source of heat in front of the front bank, baffling in the rear part of the front bank arranged to force the gases upwardly among the tubes and through the space between the first and second steam and wa er drums into a chamber extending over the drums, rear ballling arranged to cause the gases to thence pass downwardly among the second bank of tubes, and a superhcater in the space above the steam and water drums; substantially as described.

In testimony whereof, I have hereunto set my hand.

' JOHN E.,BELL. Witnesses:

ESTHER V. BURRELL, GEORGE H. SONNEBORN. 

